It seems this guy might have been born n brought up outside Bangladesh. The spelling "BengOli" is not correct...it should be Bengali.

Also he might be a patriot to India (hailed from West Bengal) as they refer their homeland as bengal, however, Bangladeshi patriots always mention their motherland as Bangladesh - the message would then look like "I would give My life for Bangladeshi. There are so many things in the world that we don't know yet so many will remain unknown!